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Tavorite

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Formula:
LiFe
3+
 
(PO
 
4
)(OH)
System:TriclinicColour:Grass-green, yellow-green
Lustre:Sub-Vitreous, Resinous, Waxy, GreasyHardness:5
Member of:Amblygonite Group
Name:Named in 1954 by Marie Louise Lindberg (Smith) and William T. pecora in honor of Elysairio Tavora [b. 1911 Brasil], professor of mineralogy, Universidad de Brasil Rio de Janeiro, Brasil.
Isostructural with:Amblygonite, Montebrasite


Amblygonite Group.

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Classification of Tavorite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/B.02-60
Nickel-Strunz 10th (pending) edition ID:8.BB.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
Dana 8th edition ID:41.5.9.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:19.1.14

19 : Phosphates
1 : Phosphates of the alkali metals
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Type Occurrence of Tavorite

Type Locality:Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil
General Appearance of Type Material:Bright lime green scales and fine-grained masses
Year of Discovery:1955
Geological Setting of type material:Late stage phosphate mineralization in a granite pegmatite
Associated Minerals at type locality:
BarbosaliteHureauliteJahnsiteRockbridgeiteTriphylite
Vivianite

Physical Properties of Tavorite

Lustre:Sub-Vitreous, Resinous, Waxy, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Grass-green, yellow-green
Streak:Pale yellow green
Hardness (Mohs):5
Tenacity:Brittle
Cleavage:Perfect
Perfect on {100}, good on {110}, distinct on {011}, and on {001}, imperfect.
Fracture:Micaceous
Density (measured):3.32 g/cm3
Density (calculated):3.33 g/cm3

Crystallography of Tavorite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 5.340Å, b = 7.283Å, c = 5.110Å
α = 109.29°, β = 97.86°, γ = 106.32°
Ratio:a:b:c = 0.733 : 1 : 0.702
Unit Cell Volume:V 174.14 ų (Calculated from Unit Cell)
Z:2
Morphology:Bladed crystals, often rounded and/or etched. Found as fine-grained masses to sever mm
X-Ray Powder Diffraction:
d-spacingIntensity
4.99 (50)
4.68 (30)
3.95 (20)
3.285 (90)
3.045 (100)
2.474 (40)
1.662 (3b)

Optical Data of Tavorite

Type:Biaxial (+)
RI values: nα = 1.795 nβ = 1.811 nγ = 1.861
2V:Measured: 74° , Calculated: 78°
Birefringence:0.066
Maximum Birefringence:δ = 0.066

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r << v
Optical Extinction:Y^b ~ 0°, Z^c ~38°, X^a ~ 15°
Pleochroism:Strong
Comments:X = Y = yellow-green, Z = colorless

Chemical Properties of Tavorite

Formula:
LiFe
3+
 
(PO
 
4
)(OH)
Simplified for copy/paste:LiFe3+(PO4)(OH)
Essential elements:Fe, H, Li, O, P
All elements listed in formula:Fe, H, Li, O, P

Relationship of Tavorite to other Species

Member of:Amblygonite Group
Other Members of Group:

- +
Amblygonite
LiAl(PO
 
4
)F
Montebrasite
LiAl(PO
 
4
)(OH)
Natromontebrasite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BB.05Amblygonite
LiAl(PO
 
4
)F
8.BB.05Montebrasite
LiAl(PO
 
4
)(OH)
8.BB.10Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(F,OH)
8.BB.10Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)F
8.BB.15Sarkinite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.15Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Wagnerite
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)F
8.BB.15Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Stanĕkite
(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)O
8.BB.15Joosteite
Mn
2+
 
(Mn
3+
 
,Fe
3+
 
)(PO
 
4
)O
8.BB.15Hydroxylwagnerite
Mg
 
2
(PO
 
4
)(OH)
8.BB.20Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
8.BB.20Satterlyite
(Fe
2+
 
,Mg,Fe
3+
 
)
 
2
(PO
 
4
)(OH,O)
8.BB.25Althausite
Mg
 
4
(PO
 
4
)
 
2
(OH,O)(F,☐)
8.BB.30Adamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.30Eveite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.30Libethenite
Cu
 
2
(PO
 
4
)(OH)
8.BB.30Olivenite
Cu
 
2
(AsO
 
4
)(OH)
8.BB.30Zincolibethenite
CuZn(PO
 
4
)(OH)
8.BB.30Zincolivenite
CuZn(AsO
 
4
)(OH)
8.BB.30Auriacusite
Fe
3+
 
Cu
2+
 
(AsO
 
4
)O
8.BB.35Paradamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.35Tarbuttite
Zn
 
2
(PO
 
4
)(OH)
8.BB.40Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Hentschelite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Lazulite
(Mg,Fe
2+
 
)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Scorzalite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Wilhelmkleinite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BB.45Trolleite
Al
 
4
(PO
 
4
)
 
3
(OH)
 
3
8.BB.50Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
8.BB.55Phosphoellenbergerite
Mg
 
14
(PO
 
4
)
 
6
(HPO
 
4
,CO
 
3
)
 
2
(OH)
 
6
8.BB.60Urusovite
CuAl(AsO
 
4
)O
8.BB.65Theoparacelsite
Cu
 
3
(As
 
2
O
 
7
)(OH)
 
2
8.BB.70Turanite
Cu
 
5
(VO
 
4
)
 
2
(OH)
 
4
8.BB.75Stoiberite
Cu
 
5
(VO
 
4
)
 
2
O
 
2
8.BB.80Fingerite
Cu
 
11
(VO
 
4
)
 
6
O
 
2
8.BB.85Averievite
Cu
 
6
(VO
 
4
)
 
2
O
 
2
Cl
 
2
8.BB.90Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.90Richellite
CaFe
3+
2
(PO
 
4
)
 
2
(OH,F)
 
2
8.BB.90Zinclipscombite
ZnFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
19.1.1Lithiophosphate
Li
 
3
PO
 
4
19.1.2Olympite
Na
 
5
Li(PO
 
4
)
 
2
19.1.3Nahpoite
Na
 
2
HPO
 
4
19.1.4Dorfmanite
Na
 
2
HPO
 
4
· 2H
 
2
O
19.1.5Nalipoite
NaLi
 
2
PO
 
4
19.1.6Stercorite
Na(NH
 
4
)HPO
 
4
· 4H
 
2
O
19.1.7Archerite
(K,NH
 
4
)(H
 
2
PO
 
4
)
19.1.8Biphosphammite
(NH
 
4
,K)(H
 
2
PO
 
4
)
19.1.9Phosphammite
(NH
 
4
)
 
2
(HPO
 
4
)
19.1.10Lithiophilite
LiMn
2+
 
PO
 
4
19.1.11Sicklerite
Li
 
1-x
(Mn
3+
x
Mn
2+
1-x
)PO
 
4
19.1.12Ferrisicklerite
Li
 
1-x
(Fe
3+
x
Fe
2+
1-x
)PO
 
4
19.1.13Triphylite
LiFe
2+
 
PO
 
4
19.1.15Marićite
NaFe
2+
 
(PO
 
4
)

Other Names for Tavorite

Other Languages:
German:Tavorit
Russian:Таворит
Spanish:Tavorita

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tavorite

Reference List:

- +
Science (1954), 119, 739
Lindberg, M. L. and Pecora, W. T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist: 40: 952-966.
American Mineralogist: 1977): 62: 559.
Soviet Physics – Crystallography: 29: 27-30.

Internet Links for Tavorite

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  • Localities for Tavorite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Conselheiro Pena
    Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
    Sergio Varvello
    Baijot, M., Hatert, F., Dal Rio, F. & Philipo, S. (2014) Mineralogy and petrography of phosphate mineral association from the Jocão pegmatite, Minas Gerais, Brazil. Canadian Mineralogist 52, 373-397.
        • Galiléia
          • Laranjeiras
    [MinRec 12:69]
          • Sapucaia do Norte
    AmMin 89:1087
    Science (1954): 119: 739; Lindberg, M.L. and Pecora, W.T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist 40, 952-966.
    • Paraíba
      • Borborema mineral province
        • Pedra Lavrada
    Am Min (1955) 40:55-63
    R. Wegner, H. Pöllmann, T. Witzke, & W. Schuckmann (1998): Colquiriite, carlhintzeite, ralstonite and pachnolite from Serra Branca-Pegmatite/Brazil.- Proceedings 17th General Meeting, IMA, August 1998, Toronto, A151
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    http://www.berthold-weber.de/h_miner.htm
    Madagascar
     
    • Fianarantsoa Province
      • Amoron'i Mania Region
        • Ampandramaika-Malakialina Pegmatite Field
          • Ambatofinandrahana District
    Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 63-64
    Morocco
     
    • Marrakech-Tensift-El Haouz Region
      • El Kelaâ des Sraghna Province
        • Sidi Bou Othmane
    Favreau, G. (2012): Deux pegmatites à phosphates de Sidi Bou Othmane (Maroc). Le Cahier des Micromonteurs, 3-2012, 71-109
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
    FRANSOLET, A.-M. (1974) Les phosphates lithiques des pegmatites de la plaine des Zenaga (Anti-Atlas, Maroc). Notes Serv. géol. Maroc, 35, 137-143
    Namibia
     
    • Erongo Region
      • Karibib District
        • Okatjimukuju Farm 55 (Friedrichsfelde Farm)
    P. Keller and O. von Knorring, Eur. J. Mineral. , 1989, 1, pp. 567-593.
        • Okongava Ost Farm 72
    Collection of Barry Murphy, Micromount specimen catalogue number 00896
        • Tsaobismund Farm 85
    Contrib Mineral Petrol (1986) 92:502-517
        • Usakos
    Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 409 (in English).
    Keller (1974)
    Portugal
     
    • Viseu District
      • Mangualde
    Mineralien Atlas
      • Sátão
        • Ferreira de Aves
          • Aldeia Nova
    Romania
     
    • Sibiu Co.
      • Lotru-Cibin Mts
    Androne, D.A.M., Buzgar, N., and Kasper, H.U. (2005): Proceedings of the Annual Scientific Session of The Geological Society of Romania, Rosia Montana, 20-21 May 2005, 16-26.
    Rwanda
     
    • Western Province
      • Gatumba District
    Bertossa, A., 1967. Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda 4, 25-45.; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
    South Africa
     
    • Northern Cape Province
      • ZF Mgcawu District
        • Kenhardt
    Minerals of South Africa
    Spain
     
    • Castile and Leon
      • Zamora
        • Villar del Buey
          • Pinilla de Fermoselle
    USA
     
    • New Hampshire
      • Grafton Co.
        • Groton
    Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
    Mineralogical Record (1973) 4:103-130
    • South Dakota
      • Custer Co.
        • Custer District
          • Custer
    Rocks & Min.:60:117.; Am Min (1969), 54:969-972
    R&M 75:3 pp 156-169
    R&M 75:3 pp 156-169
          • Fourmile
    Rocks & Minerals: 60: 117.
          • Pringle
            • Cicero Peak
    Rocks & Minerals: 75(3): 156-169.
        • Needles
    R&M 75:3 pp 156-169
      • Pennington Co.
        • Keystone District
    Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
          • Keystone
    Rocks & Minerals: 67(6): 380-388.
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